Re: EA Account registration error
Perhaps their servers are busy.
If you already had a Google play or apple account set up then you should be able to find your profiles by creating a new profile then syncing it.
It's easy enough to delete unwanted profiles.
I think the new email registration scheme is basically the same as my google play account or ios (i know nothing about apple except they are good in pies) account.
It's not compulsory, and they give you 20 gems per profile if you do it.